Access the Sound test - Highlight Two Player Contest and press Down, Down, Down, Down, Down Sound Test

When you get to the game select screen highlight two player contest and press down 5 times to get to music test and another 5 times to get to cheat mode. Once in cheat mode, press these buttons to activate the cheats:

Code Effect

Y, A, Select, A, Down, Left, A, Down 50 Lives
B, A, Right, Right, A, Left, A, X Hard Mode (No Barrels)

Unlockables

Lost World - To unlock the Lost World, you must pass the first world. In the all the other worlds, you will start to find a ''Klubba's Koisk'' in each world. When you visit one, a Kremling named Klubba will ask you to give him 15 Kremcoins to enter The Lost World. If you do give 15 Kremcoins to Klubba in a particular world, you will unlock one particular level of the Lost World.

Unlockables

"Animal Antics" Level Give Klubba 15 Kremcoins in "K. Rool Keep"

"Black Ice Battle" Level Give Klubba 15 Kremcoins in "Krem Quay"

"Fiery Furnace" Level Give Klubba 15 Kremcoins in "Gloomy Gulch"

"Jungle Jinx" Level Give Klubba 15 Kremcoins in "Crocodile Cauldron"

"Klobber Karnage" Level Give Klubba 15 Kremcoins in "Krazy Kremland"
"Krocodile Kore" Boss Beat the game and all 5 Lost World levels.